Arguably his weakest Bond effort, either this or Red Tattoo, what we have is a great concept meant to shake things up and make for a different novel. However, everything is made to simply tie itself up and ultimately loses any of the nervous energy the notion of a 007 gone mad and rogue established.
It stops itself before it really gets going to be honest. Which is a problem that happens in Facts of Death, where there is great setup, a fleshed out villain and sub-villain, a good plot, the girl, the locale and now that we're cooking...it's over.